The Zoom recorders seem like a better value than the Mix Pre IIs but I'm confident the SDs would work just as well for me. And I like the Kashmir pre-amps, they sound great to me. But my mind isn't yet made up.
Personally, I don’t really care what things say on paper. I care how they feel, sound, and operate in the field. And I care about durability.
Having used both, the Sound Devices MixPre series feels, works, and sounds better overall. The legit analog limiters are worth the price difference over hybrid digital limiters. And the plasticky construction of the Zoom recorders just doesn’t scream “this will survive productions abuses” to me. Dual card slots would be nice, but all the other tradeoffs just don’t lead me down the Zoom path.
And yes, it’s much easier to market to producers with the Sound Devices name sitting in my bag. That question does come up for me.